Machine for grinding or refining paint, cellulose, chocolate, and other substances



4July 22, 1952 w J. MGINTYRE 2,604,270

MACHINE FOR GRINDING 0R REFINING PAINT, CELLULOSE, CHOCOLATE, AND

OTHER SUBSTANCES Filed May 3, 1949 j 4 Sheets-Sheet l FINING 1E, AND

vJuly 22, 1952* J. MCINTYRE MACHINE GRINDING OR' RE PAINT, C ULOSE,CHOCOLA' OTHER SUBSTANCES 4 Sheets-Sheet 2 Filed-May 5, 1949 H July 22,1952 J 'MCINTYRE 2,604,270

MACHINE F OR. GRINDING OR REFININ PAINT, CELLULOSE, CHOCOLATE, AND

OTHER SUBSTANCES Filed May a, '1949 4 sheets-sheet 5 `I uly 22, 1952GRINDING OR REFINING PAINT, CELLULOSE', CHOCOLATE,l AND OTHER SUBSTANCES.LMSINTYR v 2,604,270 MACHINE FOR Filed May 3, 1949 4 Sheets-Sheet 4`zatented July 22, 1952 PAINT, CELLULOSE, CHOCOLATE, OTHER SUBSTANCESy lAND John McIntyre, Portobello, Scotland Application May 3, 1949, SerialNo. 91,164

In Great Britain May 10, 1948 8 Claims.

This invention'has reference to machines for grinding or rening paint,cellulose, chocolate and other substances and relates particularly tosuch machines of the type comprising av cylinder,

^ the inner face of which is provided with stationary longitudinallyextending iixed grinding bars, and a rotor mounted on a driven shaft andcarrying resiliently loaded longitudinally extending grinding bars,which, when rotated co-operate with the stationary grinding bars.

One object of the invention is to provide improvements in grindingmachines of the type set vforth whereby a better grinding action will beobtained by the co-operation of the stationary grinding bars and theresiliently loaded grinding bars.

Another object of the invention is to provide improvements whereby thematerial being ground is fed to the grinding bars.

Preferred embodiments of the invention will now be described withreference to the annexed drawings wherein:

.Figure 1 is an elevation of one construction of machine in accordancewith the invention, the

' front cover of the cylinder being removed,

i Figure 2 is an end elevation thereof showing the cylinder and upperhalf of the rotor in section,

Figure 3 shows to a larger scale an elevation of part of the rotor, theends of. two flexible spring bands and the means by which the loading istransmitted to the said two ends,

Figure 4 is an inverted sectional plan View on the line 4-4 of Figure 3of the said means .by which the loading is transmitted to the ends ofvthe spring bands,

Figures 5 and 6 are views corresponding to Figures l and 2 respectivelyof a machine in accordance with the invention but showing alternativemeans by which the loading can be adjusted, and

Figures 7 and 8 are further views corresponding to Figures l and 2 butshowing a still further alternative means by which the loading can. beadjusted, the aforesaid plates being omitted and only the uppermost andlowermost fixed and rotating grinding bars being shown in Figure 8.

In the various views like reference numerals `denote the same orcorresponding parts.

`As shown in the drawings the improved machine embodies a jacketedcylinder I0 provided with end covers having charging hoppers Il. Asuitably located sluice valve or other means, not shown, is providedthrough which the ground or refined material can .be withdrawn. Theinner surface of this cylinder is formed of lining bars l2 extendingfrom end to end of the cylinder. Said bars, which lie closely adjacentto each other, are provided with rounded inner faces and may be in theform of a lining as set forth in my U. S. A. patent application SerialNumber 90,382.

Extending axially into the cylinder is a driving shaft I3 on whichissecured a rotor I4 in the form of a wheel having on its periphery openended radial slots l5, see Figure 3. Said slots are shown arranged ingroups at regularly spaced distances apart, but they may extendcompletely round the rotor or be otherwise arranged.

Fitted into saidslots are the grinding bars I6, the fit being such thatthey can partake of a radial movement in the slots.

Said bars may be of any section found suitable; for example they may beof round section, or have ilat sides and grinding rounded ends.

The slots are such -that the grinding bars tted therein are sopositioned that one end of each is slightly in advance of the other endwhereby the said bars impart or aid in imparting a longitudinal flow tothe substance being ground or rened in addition to the usual rotaryiiow.

Carried by the rotor at the rear of each group of bars i6 is a plate Illying at such angle to the adjacent bars I6 that it forms therewith apocket in which ythe material being ground is caught and from which itpasses through the openings between the said bars. Said plates, like thebars, are so set that one end thereof, the leading end, is in advance ofthe other. Flexible pressure bands I8, conveniently of spring steel, areprovided -to bear on the inner faces of the grinding bars I6. Each bandis formed of two substantially semi-circular segments. To the end ofeach segment is secured one leaf I9 of a hinge member the other leaf,which may be made of spring steel, constituting a strut |92. The twostruts connected to adjacent ends of the spring segments are mounted ona pivot pin 20 carried by a bracket 2l having two lugs, see particularlyFigures 3 and 4. The lugs of the two upper brackets 2l straddle the endsof a cross bar 22, and the lugs of the two lower brackets straddlevtheends of a second cross bar 23. Said cross bars, which pass through slotsin the rotor, are pivotally connected towards their centres to rods 24supplied by guide lugs 25 of brackets secured to the rotor.

In the arrangement shown in Figures 1 and 2 the inner ends of the rods24 are screw threaded as at 26 and nuts screwed thereonbear on the therods 2 4 toan internallythreaded member 28 threaded 12ers causedtotravei towards or inner ends, the "pressure `,excited between theco-oper'ating grindingbars by locatedfwi-thin' a 'cy1inder 31 to which'ui d can It will therefore be appreciated said nuts the rods 24 can besuch motion being transmitted I9 to inner lugs 25. that by turning movedradially, through the cross bars 22 and the struts the ends of thesemi-circular spring bands.

When in use material introduced into the machine 'is' ground by theco-operation of the fixed grinding bars I2 of the cylinder with the`groups of rotating bars I6 of the rotor, all of which bars i6 areconstantly urged radially outwardly by means of the spring bands I S.

Should it be desired to alter the pressureV eX- erted by the bars I6 orthe bars I2 the aforesaid nuts are turned to move the rods 24 radially.

When said rods are moved radially` outwards-the l i spring bands bearharder on-the grindingbars I6 all of which then bear harder on the xedbars.

Now should the grinding bars carried by the rotor become worn they maybe Slipped'froin the slotted Wheel and reversed so that the faces whichwereforrnerly innermost now become the grinding faces.

yFurther where it may be necessary to replace said'bars the old ones can`be "*.slip`p'ed out and new ones substituted therefor.

' In the construction shown in Figures 5 and 6 are connected by means oflinks 2l on a screw threaded spindle v29. f' This spindle is providedAat one end thereof with a headwhich f `ts'within a recess in the endv:of theshaft I3, a retaining plate '39 on the end of the shaftpreventing relative longitudinal movement of the spindle. The other endof this Yspindle has fast thereon a disc 3l provided with'two holestherein.'

Arranged to engagewith the saidY holes are pins 32 carried by adiscSSrfast on aspindle' The latter is in axial'alignr'nentwiththe'shaft and V its outer end which extends through' ythe frontcover of the lcylin'd'er,"`is provided with' a hand wheel 35.

To alter Ythe'pressureexerted by the bars I6 or the bars 'i2 lthespindle 34 is moved axially inwards to bring-the said two' pins Vintoregister withtne' hoies in 'the dise s l. 'jspindie se is 'then' rotatedand a vcorresponding 'movementtra'nsmitted to the screw spindle sothatltheimember Y Y 4 awayfrorn the rotor. The movementfof said memberYis transminedtliroufghftiie links aise tnatfthe rods' 2tl are movedradially;

Thel rods in turn through the'cross'bars' and struts and spring lbandsincrease or decrease the pressureeerted by the rotating grinding barsonthered bars.

In' lthegarrangement* shown in`Figures 'land 8 the rods" 24, 'whicl1fare 'screw threadedat ltheir can be forceduoutwa'rds to increase meansof 'two opposed rams'l 3E ,plunger' 33 which works within a cylinder 33.

When fluid is forcedinto'jthe"cylinder @e Vthe rams are 'forced apart and tl ie' i f o dsV 24 turn are forced radially outwards to increase thepressure between"v cocperating vgrinding' bars. l"When the Yrods areforced apart' to impart Ithefrequisite pressure 'they may be lockedr insuch -position by bearing on the" inner lugs I claim: ,j l.' A machineofthe typeset` forthjhaving a lrotor provided with open ended radialslots-, 'grindingbarsntted in said slots so-as to be capable of varcuatesections and bearing on said bars, and

4 an outward radial movement therein and at least one resilient flexibleband bearing on said bars and urging them outwardly in and with respectto their slots.

2. A machine of the type set forth having a rotor provided with openended slots, grinding bars fitted in vrsaid slotsy so' as'to be capableof ya radial outward movementtherein, alt least one ilexible bandextending circumferentially of and within the rotor, said band beingformed of inieansconncted to the adjacent free ends of the arcuatesections by which the sections are rotor provided urged outwards.

l 3. A- machine of .the type set forth having a with open ended radialslots,

Y grinding barsr fitted in said slots so as to be capable of a radialoutward movement therein, at

least one resilient flexible band bearing on said bars to urge 'themoutwardly in their slots and plates carriedby the rtor'an'd'positionedradially inward from'fthe said'barsfthe'leading'edge of each'platevbeingffurther from-the barsthan the *trailing edge so'that,' wheny the`machine 'is in'use, theunate'riall being 'ground' isv trapped andguided "between Ithe grinding bars by Athevsaid plates.

' grinding'barsy tted in 'said "slots, "two resilient 4." A 'machineofthe type" setl forthA `having a rotor vprovided 'with y'open lvendedradial slots, grinding bars fitted 'in said' slots,v two"r`esilientbands formed'of 'arcuate'sections and bearing on said bars, radial'r'odscarried "by" the' rotor* and capable 'of` radial adjustment, lcro'ss'bars carried ATbythe o'uter'en'dsf'of said radial rods, a pair of"strut 'members secured to each end 'of each-'cross bar'and adjacentendsoftwoof lsaid arcuate sections and means by which Ithe radial rodscan be adjusted radially 'to regulate the lpressure eX- ertediby' thebands on the" bars.

5. A machine of the'type set" forth having a rotor provided 'with open*ended radial slots,

bands formed of arcuate sectionsand'bearing vbn'saidbars; radial rodsYcarried by the rotor and capable" of "radial adjustment, cross barscarried by the'outer ends-of lsaid radial 'rods,'and a` pair "ofresilientsteel'strutmembers secured'to each Vend'of `each lcrossvbarand` to adjacent 4end's of two of said arcuate sections and means bywhich the radial rods'can be adjusted Aradially-'toregu- "lateAthe-'pressure yexerted by the'bars.

6; A" machineof'the' typef'set forth' having a rotor provided "with openended radial slots,

grinding"bars""fitted"in' 'said slots, l two flexible "bands formed ofarcuatesections'and bearing on said barsgradial' rods c'arriedvby therotor and capable of radial adjustment, cross-'bars'narried by Athevouter ends of said radial rods,V apair o f strutrneinbers secured toYeach`end'of each'cross bar, each pair'being" connected toadjacent endsoftwoarcuate sections, andV means by which' said rods can be adjustedradially to regulate the 'force by whichv the said bars are urgedoutwards.

'7.` A machineof the type4 set forth having a rotor provided with openYended* radial slots,

'bands' formed"4 cf" arcuate sections and bearing grindingbars fittedinsaid slots, two ilexible onA said bars,` radial rods carried by theIrotor and capableofradial adjustmentycross bars carried bythe outer'ends of said radial'rods'. a lpair of strut members secured to each-endof each "c'rossban'eachfpair being-'connected to adjacent ends of two'arcuate sections; a screw threaded "'spindlein laxialV alignment 'withthe' axis ofV the rotor and `mounted for free rotation-with respect"'to"`tberotor,` aA collar'screwed on 'said spindle,

links connecting said collar to the radial rods and manually operablemeans to rotate the spindle so that the collar is moved axially thereonto regulate the pressure of the bands on the bars.

8. A machine of the type set forth having a rotor provided with openended radial slots, grinding bars tted in said slots, two exible bandsformed of arcuate sections and bearing on said bars, radial rods carriedby the rotor and capable of radial adjustment, cross bars carried by theouter ends of said radial rods, a pair of strut members secured to eachend of each cross bar, each pair being connected to adjacent ends of twoarcuate sections, a pair of opposed cylinders, pistons working in saidcylinders and bearing on the inner ends of the radial rods and means bywhich fluid under pressure can be supplied to the two cylinders to forcethe pistons radially outwards.

JOHN MCINTYRE.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,564,427 McIntyre Deo. 8, 19251,594,193 Bramley-Moore July 27, 1926 1,638,355 McIntyre Aug. 9, 19271,692,884 Bramley-Moore Nov. 27, 1928 1,838,565 McIntyre Dec. 29, 1931

